BSC 1010C Exam 4 Questions With Complete Solutions
A cleavage furrow is Correct Answers A groove in the plasma
membrane between daughter nuclei
A couple has a child with Down syndrome. The mother is 39
years old at the time of delivery. Which of the following is the
most probably cause of the child's condition? Correct Answers
The mother most likely underwent nondisjunction during
gamete production.
A human bone marrow cell, in prophase of mitosis, contains 46
chromosomes. How many chromatids does it contain? Correct
Answers 92
A human cell containing 22 autosomes and a Y chromosome is
Correct Answers A sperm
A man who carries an allele of an X-linked gene will pass it on
to Correct Answers All of his daughters
A man who is an achondroplastic dwarf with normal vision
marries a color-blind woman of normal height. The man's father
was six feet tall, and both the woman's parents were of average
height. Anchondroplastic dwarfism is autosomal dominant, and
red-green color blindness is X-linked recessive. What proportion
of their sons would be color-blind and of normal height? Correct
Answers Half
A woman is found to have 47 chromosomes, including 3 X
chromosomes. Which of the following describes her expected
, phenotype? Correct Answers Healthy female of slightly above-
average height
All female mammals have one active X chromosome per cell
instead of two. What causes this? Correct Answers Activation
of the XIST gene on the X chromosome that will become the
Barr body
At which phase are centrioles beginning to move apart in animal
cells? Correct Answers Prophase
Cells will usually divide if they receive the proper signal at a
checkpoint in which phase of the cell cycle? Correct Answers
G1
Centromeres split and sister chromatids migrate opposite poles
in meiosis Correct Answers Anaphase 2
Cyclin-dependent kinase is Correct Answers An enzyme that
attaches phosphate groups to other proteins
Cytochalasin B is a chemcial that disrupts microfilament
formation. How would this interfere with cell division? Correct
Answers Cleavage
Folk singer Woody Guthrie died of Huntington's disease, an
autosomal dominant disorder. Which statement below must be
true? Correct Answers It is very likely that at least one of
Guthrie's parents also have had the allele for Huntington's
disease
A cleavage furrow is Correct Answers A groove in the plasma
membrane between daughter nuclei
A couple has a child with Down syndrome. The mother is 39
years old at the time of delivery. Which of the following is the
most probably cause of the child's condition? Correct Answers
The mother most likely underwent nondisjunction during
gamete production.
A human bone marrow cell, in prophase of mitosis, contains 46
chromosomes. How many chromatids does it contain? Correct
Answers 92
A human cell containing 22 autosomes and a Y chromosome is
Correct Answers A sperm
A man who carries an allele of an X-linked gene will pass it on
to Correct Answers All of his daughters
A man who is an achondroplastic dwarf with normal vision
marries a color-blind woman of normal height. The man's father
was six feet tall, and both the woman's parents were of average
height. Anchondroplastic dwarfism is autosomal dominant, and
red-green color blindness is X-linked recessive. What proportion
of their sons would be color-blind and of normal height? Correct
Answers Half
A woman is found to have 47 chromosomes, including 3 X
chromosomes. Which of the following describes her expected
, phenotype? Correct Answers Healthy female of slightly above-
average height
All female mammals have one active X chromosome per cell
instead of two. What causes this? Correct Answers Activation
of the XIST gene on the X chromosome that will become the
Barr body
At which phase are centrioles beginning to move apart in animal
cells? Correct Answers Prophase
Cells will usually divide if they receive the proper signal at a
checkpoint in which phase of the cell cycle? Correct Answers
G1
Centromeres split and sister chromatids migrate opposite poles
in meiosis Correct Answers Anaphase 2
Cyclin-dependent kinase is Correct Answers An enzyme that
attaches phosphate groups to other proteins
Cytochalasin B is a chemcial that disrupts microfilament
formation. How would this interfere with cell division? Correct
Answers Cleavage
Folk singer Woody Guthrie died of Huntington's disease, an
autosomal dominant disorder. Which statement below must be
true? Correct Answers It is very likely that at least one of
Guthrie's parents also have had the allele for Huntington's
disease
